sandra never showed up to pick up the boys, that he had to take off from work. >> but he didn't. nor did he call her to find out why she was a no-show. ponce theorized that sandra actually did go to darren's house to get the boys. but there was an argument of some sort and she left without them. darren, still angry, followed her home. parking his truck on a street behind sandra's cul-de-sac. >> this path, you know, basically leads to the cul-de-sac. and her house is just three houses down. right when you come to the end of this walkway, very, very close, easy access. >> so you think that darren came up, followed her, had the confrontation there, killed her with a ligature, choked her to death. then what'd he do? >> you know, i think after the the incident happened over here, he went back as where he came and just took off and headed back home. >> and nobody saw him.